lecture13 - CSE 471 Media Processing and Multimedia More...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
1 CSE 471 Media Processing and Multimedia More Image Processing Operations Some operations we want to cover Edge detection, enhancement, etc. Region growing
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 CSE 471 Media Processing and Multimedia Edge Detection We want to find the boundary between two regions – abrupt change We’re looking for derivatives A derivative is a type of high-pass filter What’s a derivative in 2D?
Background image of page 2
3 CSE 471 Media Processing and Multimedia Gradients An image gradient consists of the horizontal and vertical partial derivatives = = y I x I G G I y x
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4 CSE 471 Media Processing and Multimedia Derivative Estimators Most trivial: Simple difference Note: All must add to zero Problems: Derivatives enhance noise We desire some filtering We prefer odd sized filters, not even Note relation to high-pass filtering… -1 1 -1 1 Horz: Vert: = = y I x I G G I y x
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 07/25/2008 for the course CSE 471 taught by Professor Owen during the Fall '07 term at Michigan State University.

Page1 / 18

lecture13 - CSE 471 Media Processing and Multimedia More...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online